:root {
    --vt-blue: #168af2;
    --vt-teal: #12c7a3;
    --vt-navy: #061a3d;
    --vt-slate: #5e6e86;
    --vt-cloud: #f6f9fc;
    --vt-border: #e3eaf2;
    --vt-surface: #ffffff;
    --vt-soft-blue: #eef6ff;
    --vt-soft-teal: #edf9f6;
    --topbar-height: 89px;
    --shadow: 0 20px 60px rgba(6, 26, 61, 0.05);
    --card-shadow:
        0 18px 40px rgba(6, 26, 61, 0.05),
        0 8px 24px rgba(18, 199, 163, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--topbar-height) + 16px);
}

body {
    margin: 0;
    font-family: "Manrope", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--vt-navy);
    background: #ffffff;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

.page {
    padding: 0;
}

.shell {
    overflow: hidden;
    background: var(--vt-surface);
    padding-top: var(--topbar-height);
}

.container {
    width: min(1280px, calc(100% - 40px));
    margin: 0 auto;
}

.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    width: 100%;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--vt-border);
}

.topbar-inner {
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 34px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: none;
}

.brand img {
    width: 166px;
    height: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
    justify-content: flex-start;
    flex: 1;
    min-width: 0;
    margin-right: auto;
}

.nav a {
    font-size: 16px;
    font-weight: 700;
    color: var(--vt-slate);
}

.nav a.active,
.nav a:hover {
    color: var(--vt-blue);
}

.nav-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 124px;
    height: 44px;
    padding: 0 20px;
    border-radius: 999px;
    background: var(--vt-blue);
    color: #fff;
    font-size: 14px;
    font-weight: 800;
    flex: none;
    margin-left: auto;
}

.nav-button.secondary {
    margin-left: 0;
    border: 1px solid var(--vt-border);
    background: #fff;
    color: var(--vt-navy);
}

.menu-toggle {
    display: none;
    width: 56px;
    height: 56px;
    margin-left: auto;
    border: 0;
    border-radius: 50%;
    background: transparent;
    align-items: center;
    justify-content: center;
    padding: 0;
    cursor: pointer;
    box-shadow: none;
}

.menu-toggle img {
    display: block;
    width: 100%;
    height: 100%;
}

.mobile-menu {
    display: none;
    border-top: 1px solid var(--vt-border);
    background: rgba(255, 255, 255, 0.98);
}

.mobile-menu-inner {
    padding: 18px 0 22px;
}

.mobile-nav {
    display: grid;
    gap: 12px;
}

.mobile-nav a {
    display: flex;
    align-items: center;
    min-height: 52px;
    padding: 0 18px;
    border: 1px solid var(--vt-border);
    border-radius: 999px;
    background: #fff;
    color: var(--vt-slate);
    font-size: 16px;
    font-weight: 800;
}

.mobile-nav a.active {
    border-color: rgba(22, 138, 242, 0.45);
    color: var(--vt-blue);
    box-shadow: 0 8px 18px rgba(22, 138, 242, 0.08);
}

.mobile-nav a.console-link {
    border-color: rgba(22, 138, 242, 0.28);
    background: var(--vt-blue);
    color: #ffffff;
}

.section {
    padding: 96px 0;
    border-bottom: 1px solid var(--vt-border);
}

.section:last-child {
    border-bottom: 0;
}

.hero {
    position: relative;
    padding: 96px 0 84px;
    background: #ffffff;
}

.hero-copy {
    max-width: 1040px;
    margin: 0 auto;
    text-align: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--vt-soft-blue);
    color: var(--vt-blue);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.06em;
}

.hero h1 {
    margin: 22px 0 0;
    font-size: 74px;
    line-height: 1.02;
    letter-spacing: -0.05em;
    font-weight: 900;
}

.hero p {
    margin: 20px auto 0;
    max-width: 900px;
    font-size: 20px;
    line-height: 1.7;
    color: var(--vt-slate);
}

.hero-actions {
    margin-top: 38px;
    display: flex;
    justify-content: center;
    gap: 14px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 52px;
    padding: 0 24px;
    border-radius: 999px;
    border: 1px solid var(--vt-border);
    background: #fff;
    color: var(--vt-navy);
    font-size: 15px;
    font-weight: 800;
}

.button.primary {
    border-color: var(--vt-blue);
    background: var(--vt-blue);
    color: #fff;
}

.section-head {
    max-width: 760px;
    margin: 0 auto 44px;
    text-align: center;
}

.section-head .label {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--vt-blue);
}

.section-head h1,
.section-head h2 {
    margin: 14px 0 0;
    font-size: 52px;
    line-height: 1.12;
    letter-spacing: -0.05em;
}

.section-head p {
    margin: 18px auto 0;
    max-width: 680px;
    font-size: 18px;
    line-height: 1.85;
    color: var(--vt-slate);
}

.subpage .hero {
    background:
        linear-gradient(180deg, #ffffff 0%, rgba(246, 249, 252, 0.92) 100%);
}

.subpage .hero-copy {
    max-width: 980px;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.content-grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-card {
    min-height: 100%;
    padding: 28px;
    border: 1px solid var(--vt-border);
    border-radius: 24px;
    background: #fff;
    box-shadow: var(--card-shadow);
}

.content-card h3 {
    margin: 0;
    font-size: 28px;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.content-card p {
    margin: 14px 0 0;
    font-size: 15px;
    line-height: 1.85;
    color: var(--vt-slate);
}

.content-card ul {
    margin: 16px 0 0;
    padding-left: 1.1rem;
}

.content-card li {
    margin-top: 8px;
    color: var(--vt-slate);
    font-size: 15px;
    line-height: 1.75;
}

.card-link {
    margin-top: 22px;
    display: inline-flex;
    color: var(--vt-blue);
    font-size: 14px;
    font-weight: 800;
}

.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.pill {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid var(--vt-border);
    background: #fff;
    color: var(--vt-slate);
    font-size: 13px;
    font-weight: 800;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.process-card {
    padding: 24px;
    border: 1px solid var(--vt-border);
    border-radius: 24px;
    background: #fff;
    box-shadow: var(--card-shadow);
}

.process-number {
    color: var(--vt-blue);
    font-size: 13px;
    font-weight: 900;
}

.process-card h3 {
    margin: 12px 0 0;
    font-size: 26px;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.process-card p {
    margin: 12px 0 0;
    color: var(--vt-slate);
    font-size: 15px;
    line-height: 1.8;
}

.cta-band {
    padding: 54px;
    border: 1px solid var(--vt-border);
    border-radius: 28px;
    background:
        linear-gradient(135deg, rgba(22, 138, 242, 0.08), rgba(18, 199, 163, 0.1)),
        #fff;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.cta-band h2 {
    margin: 0;
    font-size: 42px;
    line-height: 1.16;
    letter-spacing: -0.04em;
}

.cta-band p {
    margin: 16px auto 0;
    max-width: 680px;
    color: var(--vt-slate);
    font-size: 17px;
    line-height: 1.8;
}

.beian {
    flex: 0 0 100%;
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid var(--vt-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    color: var(--vt-slate);
    font-size: 13px;
    line-height: 1.7;
}

.beian a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--vt-slate);
    font-weight: 700;
}

.beian a:hover {
    color: var(--vt-blue);
}

.beian-icon {
    width: 18px;
    height: 19px;
    flex: none;
}

.beian-divider {
    color: #b7c3d2;
}

.footer {
    padding: 40px 0;
    background: #fff;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--vt-slate);
    font-size: 14px;
}

.footer-brand img {
    width: 134px;
}

.footer-links {
    display: flex;
    gap: 18px;
    color: var(--vt-slate);
    font-size: 14px;
    font-weight: 700;
}

.footer-links a:hover {
    color: var(--vt-blue);
}

.legal-page .hero {
    padding: 84px 0 40px;
    background:
        linear-gradient(180deg, #ffffff 0%, rgba(238, 246, 255, 0.55) 100%);
}

.legal-page .hero-copy {
    max-width: 920px;
}

.legal-page .hero-copy .hero-title-balance {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.legal-page .hero-copy .hero-title-balance span {
    white-space: nowrap;
}

.legal-page .hero-copy p {
    max-width: 760px;
}

.legal-meta {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.legal-meta span {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 14px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--vt-border);
    color: var(--vt-slate);
    font-size: 13px;
    font-weight: 700;
}

.legal-main {
    padding-top: 28px;
}

.legal-card {
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
    padding: 42px 46px;
    border: 1px solid var(--vt-border);
    border-radius: 28px;
    background: #fff;
    box-shadow: var(--card-shadow);
}

.legal-content h2 {
    margin: 0 0 12px;
    font-size: 34px;
    line-height: 1.14;
    letter-spacing: -0.04em;
}

.legal-content h3 {
    margin: 34px 0 0;
    font-size: 22px;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.legal-content h4 {
    margin: 24px 0 0;
    font-size: 18px;
    line-height: 1.35;
}

.legal-content p,
.legal-content li {
    font-size: 16px;
    line-height: 1.9;
    color: var(--vt-slate);
}

.legal-content p {
    margin: 14px 0 0;
}

.legal-content ul,
.legal-content ol {
    margin: 16px 0 0;
    padding-left: 1.4rem;
}

.legal-content li + li {
    margin-top: 10px;
}

.legal-content strong {
    color: var(--vt-navy);
}

.legal-content a {
    color: var(--vt-blue);
}

.legal-content a:hover {
    color: var(--vt-teal);
}

.legal-stack {
    display: grid;
    grid-template-columns: minmax(0, 920px);
    justify-content: center;
    gap: 24px;
}

.about-highlights {
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.info-card {
    min-height: 100%;
    padding: 28px;
    border: 1px solid var(--vt-border);
    border-radius: 26px;
    background: #fff;
    box-shadow: var(--card-shadow);
}

.info-card .eyebrow {
    margin-bottom: 18px;
}

.info-card h3 {
    margin: 0;
    font-size: 30px;
    line-height: 1.16;
    letter-spacing: -0.04em;
}

.info-card p {
    margin: 16px 0 0;
    font-size: 16px;
    line-height: 1.85;
    color: var(--vt-slate);
}

.contact-card {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) 280px;
    gap: 28px;
    align-items: stretch;
}

.contact-copy {
    min-width: 0;
}

.contact-copy ul {
    margin-top: 18px;
}

.contact-cta {
    justify-content: flex-start;
}

.qr-placeholder {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100%;
    padding: 24px;
    border: 1px dashed rgba(22, 138, 242, 0.32);
    border-radius: 24px;
    background: linear-gradient(180deg, #f9fcff 0%, #eef6ff 100%);
}

.qr-placeholder .eyebrow {
    width: fit-content;
}

.qr-box {
    aspect-ratio: 1;
    width: 100%;
    border-radius: 18px;
    border: 1px dashed rgba(6, 26, 61, 0.18);
    background:
        linear-gradient(135deg, rgba(18, 199, 163, 0.08), rgba(22, 138, 242, 0.12)),
        #ffffff;
    display: grid;
    place-items: center;
    color: var(--vt-slate);
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    padding: 18px;
}

.qr-note {
    margin-top: 14px;
    font-size: 14px;
    line-height: 1.75;
    color: var(--vt-slate);
}

@media (max-width: 1100px) {
    .container {
        width: min(1280px, calc(100% - 32px));
    }

    .topbar-inner {
        min-height: 0;
        padding: 16px 0;
        flex-wrap: nowrap;
        gap: 16px;
    }

    .nav {
        flex: 1;
        gap: 24px;
    }

    .hero {
        padding: 76px 0 68px;
    }

    .hero-copy {
        max-width: 100%;
    }

    .hero h1 {
        font-size: 58px;
    }

    .hero p {
        max-width: 760px;
        font-size: 18px;
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .content-grid,
    .content-grid.two {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .process-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .contact-card {
        grid-template-columns: 1fr;
    }

    .qr-placeholder {
        min-height: 0;
    }
}

@media (max-width: 720px) {
    :root {
        --topbar-height: 75px;
    }

    .container {
        width: calc(100% - 24px);
    }

    .topbar {
        backdrop-filter: none;
    }

    .topbar-inner {
        gap: 12px;
        padding: 14px 0;
    }

    .brand img {
        width: 136px;
    }

    .nav {
        display: none;
    }

    .topbar > .container > .nav-button,
    .topbar-inner > .nav-button {
        display: none;
    }

    .menu-toggle {
        display: inline-flex;
        margin-left: auto;
        width: 46px;
        height: 46px;
        background: transparent;
        box-shadow: none;
    }

    .section {
        padding: 64px 0;
    }

    .hero {
        padding: 56px 0 52px;
    }

    .eyebrow {
        padding: 7px 12px;
        font-size: 12px;
    }

    .hero h1 {
        margin-top: 18px;
        font-size: 38px;
        line-height: 1.1;
        letter-spacing: -0.04em;
    }

    .hero p {
        margin-top: 16px;
        font-size: 16px;
        line-height: 1.8;
    }

    .hero-actions {
        margin-top: 28px;
        flex-direction: column;
    }

    .hero-actions .button {
        width: 100%;
    }

    .section-head {
        margin-bottom: 30px;
    }

    .section-head h1,
    .section-head h2 {
        font-size: 34px;
    }

    .section-head p {
        font-size: 16px;
        line-height: 1.8;
    }

    .content-grid,
    .content-grid.two,
    .process-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .content-card,
    .process-card {
        padding: 22px 20px;
        border-radius: 22px;
    }

    .content-card h3,
    .process-card h3 {
        font-size: 24px;
    }

    .cta-band {
        padding: 34px 20px;
        border-radius: 22px;
    }

    .cta-band h2 {
        font-size: 30px;
    }

    .beian {
        justify-content: flex-start;
        gap: 8px;
        font-size: 12px;
    }

    .footer {
        padding: 28px 0;
    }

    .footer-brand {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 12px 16px;
    }

    .legal-page .hero {
        padding-top: 52px;
        padding-bottom: 22px;
    }

    .legal-main {
        padding-top: 18px;
    }

    .legal-card {
        padding: 28px 20px;
        border-radius: 22px;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

    .legal-page .hero-copy .hero-title-balance span {
        white-space: normal;
    }

    .legal-content h2 {
        font-size: 28px;
    }

    .legal-content h3 {
        font-size: 20px;
        margin-top: 26px;
    }

    .legal-content p,
    .legal-content li {
        font-size: 15px;
        line-height: 1.85;
    }

    .info-card {
        padding: 22px 20px;
        border-radius: 22px;
    }

    .info-card h3 {
        font-size: 26px;
    }

    .info-card p {
        font-size: 15px;
        line-height: 1.8;
    }

    body.mobile-menu-open .mobile-menu {
        display: block;
    }
}